0 a thin piece of skin inside the ear that moves backwards and forwards very quickly when sound waves reach it, allowing you to hear sounds -- 耳膜，鼓膜
Our eardrums are designed to pick up everything.
They wished to be seen immediately, as they were worried about meningitis and other long-term complications such as fear of perforating the eardrum and deafness.
To be sure, motion can be measured relative to the retina, the eardrum, and so on.
The outer ear consists of the pinna and auditory canal, and the boundary between it and the middle ear is formed by the tympanic membrane, or eardrum.
Although loudness is a subjective effect of pressure on the eardrums, unfortunately the sound level meter is not subjective.
Loudness is a subjective effect of pressure upon the eardrums, and it varies from person to person.
What is more, it releases a thousand times more energy into the eardrums.
That is not inconsiderable for both the eardrums and the general enjoyment of life.
